revision: implement sparse algorithm

diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 3c6bf8d8556ec0f6b512dd2550ec520b119f975a..6b3bbf99e46cf7cc418eca1eaf768d526ac658aa 100644 (file)
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -853,9 +853,23 @@ test_must_be_empty () {
 
 # Tests that its two parameters refer to the same revision
 test_cmp_rev () {
-       git rev-parse --verify "$1" >expect.rev &&
-       git rev-parse --verify "$2" >actual.rev &&
-       test_cmp expect.rev actual.rev
+       if test $# != 2
+       then
+               error "bug in the test script: test_cmp_rev requires two revisions, but got $#"
+       else
+               local r1 r2
+               r1=$(git rev-parse --verify "$1") &&
+               r2=$(git rev-parse --verify "$2") &&
+               if test "$r1" != "$r2"
+               then
+                       cat >&4 <<-EOF
+                       error: two revisions point to different objects:
+                         '$1': $r1
+                         '$2': $r2
+                       EOF
+                       return 1
+               fi
+       fi
 }
 
 # Print a sequence of integers in increasing order, either with